Guitarix team http://www.guitarix.org/
2 Pedalboards using it

GxScreamingBird

Plugin screenshot

Emulation of the Electro-Harmonix Screaming Bird treble booster (*) (*) 'Other product names modeled in this software are trademarks of their respective companies that do not endorse and are not associated or affiliated with MOD. Electro-Harmonix Screaming Bird is a trademark or trade name of another manufacturer and was used merely to identify the product whose sound was reviewed in the creation of this product. All other trademarks are the property of their respective holders.' *Unofficial documentation

Control Default Min Max
SCREAM 0.50 0.00 1.00
http://guitarix.sourceforge.net/plugins/gx_scream_#_scream_ v.1:28.3-9